From 33f78c858bab404ea6957f350ae2b262e5aa685a Mon Sep 17 00:00:00 2001
From: dirk <dirk@git.imagemagick.org>
Date: Sun, 19 Jun 2016 12:36:11 +0200
Subject: [PATCH] Fixed calculation of the device_signature.

---
 MagickCore/opencl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MagickCore/opencl.c b/MagickCore/opencl.c
index ca92c771b..a740f19cd 100644
--- a/MagickCore/opencl.c
+++ b/MagickCore/opencl.c
@@ -2075,7 +2075,7 @@ static MagickBooleanType HasOpenCLDevices(MagickCLEnv clEnv,
       continue;
     }
     device_signature=signature;
-    device_signature=StringSignature(device->platform_name);
+    device_signature^=StringSignature(device->platform_name);
     status=CompileOpenCLKernel(device,accelerateKernelsBuffer,options,
       device_signature,exception);
     UnlockSemaphoreInfo(device->lock);
-- 
2.40.0